Rounding machine



J. P. FREDERlcKsEN 2,363,124

ROUNDING MACHINE Filed July 21, 1942 Nov. V2 l 1 5 Sheets-Sheet 2 Patented Nov. 21, 1.944

PATENT' OFFICE e RoUNniNG' MACHINE e JamesR Fredericksen, Quincy, Mass., assignor to i.

United Shoe Machinery Corporation, FlemniryA f i .t e

evtonrl. J., a corporation of NewiJersey Application Julyai, 1942, serial No. 451,745

` ioLiz-fis) e Y,

` therefore, only `necessary to decide upon a clear- "24 olaiiiis.

i This invention relates to `machines for round`` ing or cutting work-pieces to the desired contour,

it` being especially applicable toapparatus for rough-rounding soles attached to shoe-uppers.

In rounding machines ofthe type disclosedin Letters` Patent of the United States No.1 ,030i,606, e

Perry,` `June 25, 1912, kthe work is advanced in successive` steps to receive `,the e action of` a `rei eiprooatory chopping knife, byouter and inner members whichhave a relative movement of approach to `grasp the sole-edge. They then oscillate together to feed the workforward, after which they separate torelease `said Work and swing rearwardly in preparation for the next to each other, so that the innermay drag upon.` the surface ofthe workl Rearward displacement of said work by this contact, which would reduce the eiective advance, is resisted `by the chopping knife 'and sticker-point. There may, however,` be 'an insufcientfchip? or Waste-margin `tofbe engaged by the latter, ,so .theyretaining efe feet is not enough to prevent what is commonly ance which will guard against back-feeding engagement, and thiswill be created between 'the feeding members and the margin ofza isole, `re-` gardless of its thicknessi"and`expansibi1`ity-` The means which withdraws one of the feeding members from the work isfpreferably made effective in the feeding movement of` said members. `As herein disclosed, this means consists of a coupling device through which "the movement of separation or work-release" is transmitted, said:

coupling device being disconnected at the termi-l nation of the return movement of the feeding members to permit the work-measuring effect. The time-relation of this release and the point of connection of the? coupling device may be made variable. More specifically, the means `for grasp.-

ing and measuring` the! Workincludes a spring, while the withdrawing or actuating meansforthe feeding member may include a cam. The cou` pling `device is preferablyfurnished by a rack or toothed member and a pawl which engagesiit, the i toothed member beingmovable by thecam or by the feeding member.

In the accompanying drawings,

` "Figl 1 `shows in broken side elevation a particular embodiment of my invention, i the elements being shown asthe bottom-rest approaches the end of its reverse travel;`

termed back-feed. This is especially liable tobe present when the sole-edge` differs considerably in thickness about the periphery, as in springe heel-shoes or those with rubber soles.` Here, the separation between the feeding members, which is adequate at the thinner `portionsywill cause them to bind and back-feed at the thicker, Par-` ticularly troublesome in this respect is the roundi ing of crepe-rubber soles, with` whichto the considerable variations in thickness, are added the expansibility of the material `and its adhesiveness. e An object of this invention is to ensure such` a separation `between the `work-feeding members, that the retrograde movement will be i prevented, whateverthethickness and character ofthe work."` e

Togain the above end, ,In produce arelative .movement of the feeding memberswhich coop ofFig. l;

` Fig. 3, a .fragmentary top plan view, enlarged;`

of the work-feeding elements when in their ex,-` tremerearward` positions; 1

Fig. 4, a partial Verticalsection `on,` the line IV-IV of Fig. 1;

and i i i Fig. Sis a fragmentary Vside elevation, show-` ing the withdrawing mechanism for the bottomrest after the rest i has `terrriinatedf its reverse travel. f i

` have chosenf tofillustratefthis `inventionin connection with the machine'ofithe previously erate with the rounding knife through4 a prede# termineldV distance from the surfaceof the work, this being accomplished by measuring the thick-v ness of saidwork and' then adding the movement of release tothis measured dimension j It` is`,1

mentioned patent, this?` beingfthe xwell known Goodyear-UniversaliRounding `and `Channeling Machine-ModelluEi `This.apparatus may be employed toiroughetound a solei Sattached toA the ,e

bottom of afshoeeupper U, and:y tosimultaneously cut al channel therein'.` Itis the former pur,

pose which is 'important lin the,y preseutconnec- Fig. 2` isf a horizontal section onine line Ii-Ir tion, and no further consideration will be given ito the production of the channel. There is a choppreferably imparted Ato the bottom-rest to separate rubber offers the worst conditions, and, to eliminate the possibility of back-feed for this and all materials, however variable in thickness1 introduce an additional movement of the feeding members which takes into account the thickness of the work being operated upon. This movement is it from the feed-plate, and is initiated from the reciprocated longitudinally by a groove 2l! in the periphery of a cam-cylinder 22 upon a shaft 24 and oscillated by a groove 26 in the inner face of the cam-cylinder. The shaft is constantly driven in the direction of the arrows in Figs. 1 and 4.

The Work-feeding member co-operating with the plate I6 consists of a block 28 opposite said plate and providing a bottom-rest for the tread-surface of the sole S. `This bottom-rest is supported upon a carrier-arm 30 rising from'the forward extremity of a sleeve 3l securedto a tubular shaft 32, journaledin bearings 33 and 34 ,upon the frame I4. vThe shaft is oscillated to give the work-feeding effect from a groove v35 in the cam-cylinder 22, through a bell-crank-lever 36 and an arm 38 extending from the sleevevSI and which may travel along a projection 45 from the lever. The bottom-rest is thrust yieldably toward the feedplate I6 by a tension-spring 42 and a lever 44, acting upon a rod 46 `extending into the tubular shaft. The arrangement wherebythe bottomrest yields may beas in Letters Patent of the United States No. 1,955,753, Lawson, April 24, 1934, and allows the .feeding means to accommodate itself to soles of different thicknesses. For the entrance of the sole-edge between the feed-plate and the bottom-rest, the latter may be retracted tread-surface of the sole. Attached to the'frame I4, below and at one side ofthe shaft 32, is a bracket 5D, in which is rotatable a pinion 52 oscillated by a bell-crank-lever 53 upon one arm of which is a gear-segment 54 meshing with the pinion, A second arm of the lever has turning uponit a roll 56 lying in a cam-groove 58 in the periphery of the cam-cylinder 22. The side-walls by the actuation of a lever` 41 which engages a lo projection from the sleeve 3I.

Considering a'single cycle of the feeding and rounding mechanisms described above, and starting with the plate I6 and rest 28 at the right, or

as seen in Fig. 3', the plate is positioned outwardly l from the rest to the maximum extent. This gives a space which may be increased by actuation of the lever 41 and into Vwhich the operator may introduce the sole-edge. The rounding knife I is fully withdrawn rearwardly. A sole is located by the operator by engagement of the crease between the upper U and the sole S with the guide I1, the welt or upper margin of the sole-edge being presented to the feed-plate I6 and the tread-surface to the bottom-rest 28. The feedwith its sticker-pointll to make a rounding cut r:

against the plate. The knife maintains this position with the sticker-point in the severed margin,

of this groove liegenerally in parallel planes at f right angles tothe axis of rotation, except at 59, where there is a lateral offset which turns the lever53 abruptly clockwise (Fig. 1), so holds it for a time and then returns it to the normal position. The roll vmay be differently located along the lever by clamping its mounting in a vertical slot 60. Projecting from the pinion is an arm 6I, which may be secured in different angular positions by a slot-and-screw connection 62. The arm extends between pins (i4, 64 passing through a horizontal slot 66 at one side of horizontal ways in the frame I4. In the ways, a slide [i8 is movable, it carrying the pins 64 and bearing upon its upper side a toothed rack T. `Meshing with the rack-teeth are double pawls 12, 12, staggered to ensure prompt engagement. The pawls are pivoted side by side upon a projection I4 from the sleeve 3|, and are urged toward the rack-teeth by their respective leaf-springs 16, 'I6 attached to a lug I8 upon the sleeve. The rack-engaging points of the pawls are variably'limited in the extent of their downward movement by screws 80 threaded through tails 82 and contacting with the underside of the lug.

During the feeding and return movements of thesleeve 3| with thearm 30 and bottom-rest 23, the relation, of thedepth of engagement of the pawls 'I2 with the teeth 'I0 to the angle through which said pawls oscillate, is such that the points of the pawls lie between the teeth at y all times, save when ther bottom-rest in its movement to the right is approaching the initial position from which it starts its opposite, work-feeding travel. At this time, the pawls leave the teeth, so the bottom-rest may be positioned under the influence of the spring 42. As the pawls thus clear the teeth, the cam-offset 59 is just leaving the roll 56 of the'lever 53. The operator by movement of the lever 41 draws back the bottomrest against the force of the spring, introduces the sole-edge betweenthe feed-plate and. bottomrest .to an extent determined by the crease-guide Il and releases the lever. As the bottom-rest reaches the position illustrated in Fig. 3, ready for its feeding advance, the pawls 'I2 are fully lifted from the teeth 10, as appears in Figs. 5 and 6. Said bottom-rest is thus freed to be carried by the spring 42 into contact with thel treadsurface of the sole, at whatever point in the pewhile the bottom-rest `returns the full distance to l riphery is then presented to it', Aand holds the welt-side of the edge against the feed-plate. There is thus measured the thickness of the sole at the point engaged. As the bo-ttom-rest and feed-plate begin their forward feeding movement, the pawls have entered between the teeth, these elements being made effective as a coupling device to join the sleeve 3| to the actuating slide 68'. The roll 56 is at this time in the main porescalas i i i 3 :tion of the .groove 58, which holdsthe lever 53 asainstmovernent. But just as the cam-groove ,5- stertsthe .idle return movement ofthe bottomn rest, the .earn-,offset 5.9. acts upon the roll, swingi- 'ing `the levercloekwise (Fie, l) and rotatingtbe pinion 52. contradeckwise. Theermtl is turned te the left, and, by contact `with the pin 64 at that side, correspondingly shifts the slideB.

*The tettlfli'lll` acting upon the pawls l2 move the .Sleeve t! i in the same direction, separating the bottemfrest positively from the sole byiwhatever distante may be desirable to ensure against backfeeding effect unen the Work- Figs. 1, 2 .and4` of the drawings illustrate the elements at an intermediate point in the movement of withdrawal. The `liest is held in the retracted position until the reverse travel is at the point of completion,

"the Dewls are raised from the teeth, when the offset passes away from the roll, restoring the sli 63 to its initial position` andileaving the bot- .free to measure the thickness of the solo et the point which is now presented. If-wil-l he seen that, by such an organization, variations fectupon the distan-ce through which the bottomrest is separated from the treadesurface of the i sole. This distance may be chosen with reference to preventing undue frictional engagement of to gradually round the sole during its feed to a cgntourdetermined by the entrance of the guide l1 into thecrease. Adjustment of the roll 56 along the slot 60,111 the lever 53 provides `for the correct timeerelation between reversal of oscillation ofthe bottom-rest and its withdrawal from the work. By angular adjustment ofthe arm 6| I and `consequent variation in the normal position of the slide Bil, it may be made certain that, for

in the thickness of the sole-edge are without efthebottom-rest with said surface, while it stili is in a position to steady the work against sepa- `ration the feed-plate. The chopping knife l!) acts in the usual manner by its successivecllts,

time-relation betweenA the return movement and the release ofthe work.

, 3,In afrounding machine, a knife, `opposite` work-feeding members :co-operating with the i knife, means for moving `the` feeding members in opposite directions first to advance the work to receive the action of theqknife and then toreturn them to their initial positions, means for` establishing contactbetween the members` and the worktomeasure its thickness, and means for moving the members relatively `to grasp thework for feeding and to release it,the movementof` release beingy added to the measured thickness.

4, In a rounding machine, a `knife,`,opposite Work-feeding members co-operating with the knife, one of said `members being yieldable under the influence of the work, `meansifor moving the other,` member toward` and from the yieldable member alternately to grasp the work for feeding and to release it, means for moving the yieldable member through a predetermined distanceifrom the point at which `the work positioned it in its i yield, and means for moving the 'members `to gether with thefgrasped workand in the opposite directiontwhen `saidiwork, is released.

5. In a rounding machine,` a knife, opposite work-feeding members (1o-operating with `the knife, means for imparting to the members their feeding movement, means for moving the mem` bers relatively `to grasp the work, and means for withdrawing one ofy the members from the work, said withdrawing` means being made `effec,- tive vas a result of the feeding movement of the members. i i

6. In a rounding machine, a knife, opposite work-feeding members `co-operating with the i knife, means for imparting to the members their feeding movement, means including a spring for i vmoving the members relativelyto grasp the work,

anyrange of thickness ofsole-edgesbeing oper-` i `'Work-feeding members co-operating `with the lgnife, means for moving the feeding members in opposite directions first to advance the work to receive the action of the knife Aand then to re-` turn them to` their initial positions, and means for producing relativemovement of the `members toward and from each ,other alternately to grasp the work for feeding and to release it during the i return movement, the movement of release` being through a predetermined distance from the surface `of the work.

V 2. In a `rounding machine, a knife, opposite v work-feeding members ctn-operating with the i knife, means` for moving the feeding members fin e opposite directions first to advance theiwork to receive the action ofthe knife `and then to reretnrn movement, the movement of release` being threllh apredeternined distance fromthe suri opposite directions` first to advance' the work to` receive the action of the knife and then to return `them to their initial positions, means for `prol.

ducing relative movement of `the members toward turn them to their initialfpositions, means for i` producingrelative movement of `thememloers to- "ward` and from each1 other alternately tograsp the work for feeding and to release it, during the and a ,cam for withdrawing one of the members `frornthe worktsaid withdrawing means being made effective as .a result ofthe feeding movement of the members. i

'7. In a rounding machine, a knife, opposite work-feeding members (xo-operating `with the knife, `means for moving `the feeding members in and from each other alternately to grasp the work fiorifeeding `and to release it during the re# turn movement,u means for producinga further movement of separation `between the members, i

and acoupling device through which such further movement of `separation is transmitted, said i `coupling device being disconnected bythe rn-ove-` i ment of the members.

8. In a rounding machine, a knife, opposite work-feeding members coi-operating with `the knife, meansfor moving the feeding members in opposite directions first to advance the Work to` receive the action of the knife and then toreturn Vthem to their initial positions,` means for `proi i lducing relative movement of the members toward i `and from each other alternately to grasp the work for feeding and to release itduring the return movement, means for producing ajfurther movement of separation between the members,

`and a coupling device through which such further movement of separation is transmitted, said coui pling` devicebeing disconnected at theterinination of the return movement of the members. i

i l ,i l e i 9. In aorounding machine, a knife, o s' ,tageof theWork.` and rneansarraneed to vary the pp'o we work-feeding members co-operating with the knife, means for moving the feeding members in opposite directions rst to advance the work vto receive the action of the knife and then toreturn them to their initial positions, means forl producing relative movement of the members toward and from each other alternately to grasp the work for feeding and to release it during the return movement, means for producing afurther movement of .separation between the members, and a toothed member and engaging pawl through which said further movement of separation is transmitted. g y

10.'In a rounding machine, a knife, opposite work-feeding members co-operating with the knife, means for moving the feeding members in opposite directions first to advance the work to receive the action of thevknife and then to return them to their initial positions, means yfor proknife', means for moving the feedingmembers in v4opposite directions rst to advance the work to receive the action of the knife and then to return them to their initial positions, means for producing relative movement of the members toward and from each other alternately to grasp the work for feeding and to release it during the return movement, an actuating member by which movement of release is produced, a toothed member movable by the actuating member, and a pawl carried by one of the feeding members for engaging and disengaging the toothed member during a portion of the movement of the feeding members.

l2. In a rounding machine, a knife, opposite work-feeding members co-operating with the knife, means for moving the feeding members in opposite directions first to advance the work to receive the action of the knife and then to return them to their initial positions, means for producing relative movement of the members toward and from each other alternately to grasp the work for feeding and to release it during the return movement, means for producing a further movement of separation between the members, a movable toothed member and engaging pawl through which said further movement of separaition is transmitted, and means arranged to vary the time at which the movement of the toothed member is initiated.

13. In a rounding machine, a knife, opposite work-feeding members co-operating with the knife, means for moving the feeding members in opposite directions first to advance the work to receive the action of the knife and then to `return them to their initial positions, means for producing relative movement of the members toward and from each other alternately yto grasp the work for feeding and to release it during the return movement, means for producing a further movement of separation between the members, a toothed member and engaging pawl through which said furthermovement of separation is transmitted, and means arranged to vary the normal relation between the toothed member and the pawl.

V14. In -asole-rounding machine, a rounding knife,'workfeeding members for engagement wlth opposite sides of a sole and co-operating with the knife,'means for moving lthe members together to lfeed the work, means for moving one of the members to measure said work, and means for moving such member away from the work from a point determined by themeasurement 15. In a sole-rounding machine, a rounding knife,` work-feeding members for engagement' with opposite sides of a sole and co-operating with the knife, means for moving .the members together to feed the work, means for forcing one `of said members yieldably against the work, and Vmeans acting under the power of the machine for withdrawing saidmember positively from the `work through a predetermined distance.

A cam,and`means connecting the camV to the spring-' l16. In a sole-rounding machine, a rounding knife, work-feeding members for engagement with opposite sides of a sole `and co-operating with the knife, means for moving the members together to feed the work,l a spring acting to force one of said members against the work, a movable actuated mem-ber in different positions of said spring-actuated member as determined by its engagernent With the work.

1'7. In a sole-rounding machine, a rounding knife, work-feeding members for engagement knife, work-feeding members for engagement with opposite sides 0f a sole and co-operating with. the knife, means for moving the members -together to feed the work, a spring acting to force one of said members against the work, a movablef'cam, means .connecting the cam to the spring-actuated member in different positions of said spring-actuated member as .determined by its engagement with the work, and means arranged to vary Athe point at which said connection rwill occur.

19. Ina sole-rounding machine, a rounding knife, an oscillatory feed-plate and bottom-rest for engagement with opposite sides of a sole, an oscillatory member by which the |bottom-rest is carried, a spring acting upon the member to force the bottom-rest toward the feed-platea rotatable cam, a rack, and a pawl engaging said rack,'one of such engaging members being carried by the member and the other being movable by the cam.

20. In a sole-rounding machine, a rounding knife, an oscillatory feed-plate and bottom-rest for engagement with opposite sides of a sole, an

oscillatory member by which the bottom-rest is carried, a spring acting upon the member to forcev thebcttom-rest toward the feed-plate, a rotatable cam, a rack, and a pawl engaging said ra-ck, one ofA such engaging members being carried by the member and the other being movable by the cam and separating during a portion of the oscillation of the member.l

21. In a sole-rounding machine, a rounding knife, an oscillatory feed-plate and bottom-rest for engagement With opposite sides of a sole, an

oscillatory sleeve by which the Ibottom-res't'is y a,ca,124 l 5 carried, a spring acting upon thesleeve tonforce the bottom-rest toward the feed-plate, a recip-l rocatory rack, a rotary cam, a lever movable by the cam and connected to the rack, anda pawl l carried by the sleeve' and engaging the rack. l

22. Ina sole-rounding machine, a rounding knife, an oscillatory feed-plate and bottom-rest the bottom-resttoward they feed-plate, a reciprocatory rack, a rotary cam, a lever movable by n the cam, agearoscillated by the lever, an armex-` n tending from the gear and anting upon the rack,

and a pawl carried by the sleeve and movable into and out of engagement with the rack during the oscillation of the sleeve.

for engagement With opposite sides of a sole, an f oscillatory sleeve byfwhich the bottom-resi; is carried, a spring acting upon the sleeve to force the bottom-rest toward the feed-platea `reciprocatory rack, a rotary cam, a" lever movable by the cam and connected to the rack, and a pawl *carried by the sleeve and movableintoand out of engagement withthe rack during the oscilla` l tion of the sleeve.`

23. In a sole-rounding machine, a rounding knife, an oscillatory feed-plate and bottom-rest for engagement withopposite sides of a sole, an oscillatory sleeve by which the bottom-rest is carried, a spring acting upon the sleeve to force l sleeve and movable into and out of engagement n 20` V24. In a' sole-rounding machine, a rounding knife, an `oscillatory feed-plate and. bottom-rest for engagement with opposite sidesof` a sole, an

l oscillatory sleeve `by which the bottom-rest is carried, a spring acting upon the sleeve to force the bottom-rest toward `the feed-plate, a recip-` rocatoryrack,` a rotary cam, a lever movable by the cam, a gear oscillated by the lever, an arm extending from the gear and acting upon the rack; means arranged to X the arm in different positions upon the gear, and a pawl carried bythe with the rack during the oscillation of the sleeve.

JAMES P. FREDERICKSEN 

